Caitanya Mahaprabhu said, yei krsna-tattva-vetta, sei ‘guru’ haya: [Cc. 1.8.128] “Anyone who knows the science of Krsna, he can become guru.” That is our mission. That is not my mission; that is Caitanya Mahaprabhu’s mission. So it doesn’t matter you Europeans, Americans although not born in brahmana family. It doesn’t matter. That is Caitanya Mahaprabhu’s approval. If you try to understand the science of Krsna, then, and if you behave properly, you can teach about Krsna all over your country, all over the world. That is my mission. And that is approved by Caitanya Mahaprabhu. Try to understand the science of Krsna. Then you will be able to preach nicely and people will be benefited.
Srila Prabhupada, Lecture, 1 Jun 1975